Sink



FIG. 1 is a top, front, right perspective view of an embodiment of the claimed design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross-sectional view thereof taken across line 8-8 of FIG. 6.

Broken lines formed by equal length dashes depict environmental subject matter only and form no part of the claimed design. The dash-dot broken lines define bounds of the claimed design and form no part of the claimed design. 

CLAIM I claim the ornamental design for a sink, as shown and described. 